Acetic acid (2S,3S,6S)-6-cyano-2-methyl-4-oxo-tetrahydro-pyran-3-yl ester 在
L-Selectride 作用下,
以
四氢呋喃 为溶剂,
反应 1.0h,
生成 Acetic acid (2S,3R,4R,6S)-6-cyano-4-hydroxy-2-methyl-tetrahydro-pyran-3-yl ester 、 Acetic acid (2S,3R,4S,6S)-6-cyano-4-hydroxy-2-methyl-tetrahydro-pyran-3-yl ester